초록 ▼

Methods and apparatus for preventing spoofing of targets, such as aircraft, in an air traffic control system. In one embodiment, first and second antennas at respective ground stations can be used to receive a signal transmitted by an aircraft from which a phase signal can be generated. A position o

Methods and apparatus for preventing spoofing of targets, such as aircraft, in an air traffic control system. In one embodiment, first and second antennas at respective ground stations can be used to receive a signal transmitted by an aircraft from which a phase signal can be generated. A position of the aircraft generate can be generated from peaks and troughs in the phase signal due to movement of the aircraft. The determined position can be compared to a position reported by the aircraft to identify spoofing of the target.

대표청구항 ▼

What is claimed is: 1. A method, comprising:receiving a signal from a target at first and second ground stations forming part of an ADS-B air traffic control system;determining a phase difference signal between the signal received at the first ground station and the signal received at the second gro

What is claimed is: 1. A method, comprising:receiving a signal from a target at first and second ground stations forming part of an ADS-B air traffic control system;determining a phase difference signal between the signal received at the first ground station and the signal received at the second ground station;determining peaks and troughs in the phase difference signal due to movement of the target;comparing the determined peaks and troughs in the phase difference signal with a phase difference derived from a position of the target reported by the target; andidentifying spoofing of the target from the comparison of the determined phase different signal and the signal derived from the position of the target reported by the target.